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Chapter: H Commands

H Commands

This chapter describes the Cisco NX-OS Open Shortest Path First (OSPF) commands that begin with H.

hello-interval (OSPF virtual link)

To specify the interval between hello packets that Cisco NX-OS sends on an Open Shortest Path First (OSPF) virtual link, use thehello-intervalcommand. To return to the default setting, use the noform of this command.

hello-interval seconds

no hello-interval

Syntax Description

seconds

Hello interval (in seconds). The value must be the same for all nodes on a specific virtual link. The range is from 1 to 65535.

Command Default

10 seconds

Command Modes

Virtual link configuration mode

Command History

Release

Modification

5.0(3)N1(1)

This command was introduced.

Usage Guidelines

Use the hello-interval command in virtual link configuration mode to set the hello interval for OSPF across a virtual link. A shorter hello interval detects topological changes faster but causes more routing traffic. The hello interval must be the same for all devices on a virtual link.

This command requires the LAN Base Services license.

Examples

This example shows how to configure the hello interval to 15 seconds:

switch(config)# router ospf 202

switch(config-router)# area 99 virtual-link 192.0.2.4

switch(config-router-vlink)# hello-interval 15

switch(config-router-vlink)#

Related Commands

Command

Description

copy running-config startup-config

Saves the configuration changes to the startup configuration file.

dead-interval (virtual link)

Sets the time period to declare a neighbor as down if the local device receives no hello packets.